Bag-machine.



Patented Dec. 3|, l90l.

G. R. WARD.

BAG MACHINE. (Applicatiofl filed Dec. 10, 1900.

3 Sheets-Sheet I.

(No Model.)

llllllli ATTORNEY No. 699,999. Patented Dec. 3|. I901. 9.99. WARD.

,BAG MACHINE.

(Application filed Dec. 10, 1900.) (No Model.) 3 Sheets-Sheet 2.

Q $3 I ,NW

WITNESSES: ENTOR ma f- I ATTORNEY m: NORRIS PETERS 0a.. wovqumoIwAsmNpmn, n. b.'

No. 699,999. Patented Dec. 3|, mm.

a. R. WARD.

BAG MACHINE.

(Application filed. Dec. 101 1900.)

3 Sheets-Sheet 3.

(No Model.)

ATTORNEY ms Nomus Pzrsns c0. vncmuwo WASNINGTUN, 04 c4 Uivirnn STATES PATFT OFFICE.

GEORGE R. lVARD, OF NEW YORK, N. Y., ASSIGNOR TO CHARLES F. COBURN, OF BOSTON, MASSACHUSETTS.

BAG-MACHINE.

SPEGIFICATIQN formingpart of Letters Patent N 0. 689,999, dated December 31, 1901.

Application filed December 10,1900. Serial No. 39,328. (No model.)

To all whom. it may concern:

Be it known that I, GEORGE R. WARD, a citizen of the United States, residing at New York, State of New York, have invented certain new and useful Improvements in Bag- Machines, of which the following is a clear, full, and exact description.

My invention relates to bag-machines; and one of my objects is to provide a machine which will receive a bag and fold it in the manner desired. It is desirable in a completed bag that when it is distended by air or by the material with which it is filled its bottom should automatically assume an angular, preferably a rectangular, shape.

One object of my invention is to provide a machine which will so fold a bag that it will when distended assume the rectangular-bottomed form desired.

In the preferred embodiment of my invention shown in the drawings I have provided a machine which will receive a bellows-folded bag in a flattened condition and distend the bottom-forming end of the same into a rectangular shape and double the bottom over upon itself, thus defining the edges of the rectangular bottom.

Other advantages of my invention will be apparent and the invention will he defined in the claims.

In the drawings showing the preferred embodiment of my invention, Figure 1 shows a side elevation at the position when the bottom of the bag has been distended into a rectangular shape, the bag being shown in dotted lines. Fig. 2 is a plan view of the same. Fig. 3 is a front elevation of the device shown in Fig. 1 with the folder-bar broken away. Fig. 4 is avertical longitudinal sectional view through the hollowed rolls at the time when the suction devices commence to act, adjacent parts being indicated by dotted lines. Figs. 5 and 6 are detail views showing the position of the rolls and bag at different points in the operation. Figs. 5, 5", 6, and 6 are detached edge elevations of the upper and lower stationary cams for throwing in the distending-fingers. Fig. 7 shows a common bellows-folded bag, such as I prefer to have the machine operate on; and Fig. 8 shows the lower end of the same bag after it has been folded by the machine illustrated in the drawings.

In the above preferred embodiment l is the base, and 2 2 the sides, of the frame. In the present form of the machine the bottom-forming end of the flattened bag is received be tween a pair of rollers 3 4, carried on suitable shafts mounted in the frame. These rolls do not in this embodiment rotate continuously in the same direction, but oscillatethat is, they rotate forward and then backward. A cam 14, loosely mounted on the lower shaft, rotates continuously in the direction of the arrow in Fig.1 and strikes arm 14, carried by a shaft 14, which passes loosely through hollow shaft 15, Fig. 3. Arm 14* is normally thrown upward from the position shown in Fig. 1 by a spring 14. On the other end of this shaft is fixed an arm 14, engaging pins 14 14 on the reciprocating rack 12. The rack engages gears 11 on the roll-shafts and as it is reciprocated the rolls are oscillated. The bag is caught between the rolls and fed forward as they are rotated from the position shown in Fig. 4 toward that shown in Fig. 5, and in order to distend the bottom-forming end of the same I have provided a suction device which will contact with the flattened bag, preferably with the plies of the same, and distend or assist in distending the bag-bottom preferably into a rectangular form. In the present embodiment I use rolls, and I prefer to hollow out the rolls and shafts and provide the rolls with suction-apertures 3 4, which will overlap the plies of the bag. is exhausted from the rolls and they are rotated, the plies of the bag will cling to the rolls and the plies will be separated, as shown in Fig. 5. To so exhaust the air, I may use many different devices; but in the present embodiment- I have provided a pump, Fig. 1. The piston-rod 26 may be worked by hand or it maybe suitably connected to the machine, if desired. I have shown it in line with the rack 12 to indicate this. The pipe 27 may be connected with the hollow shafts, thus connecting the hollow rolls with the vacuumchamber of the pump. By vacuum-chainber I merely mean any space from which the air has been partially exhausted.

To assist in distending thebottom-forming If new air with the rolls 3 at.

the edges of the rectangular bottom.

end of the bag, I have provided means which engage the bag and then move away from the line of feed of the bag. In this embodiment these distending means engage the bag and move along with it as the same is fed forward. In the embodiment shown in the drawings these distending means consist of distendingfingers 5 5, which are preferably rotatable I prefer to provide a pair of fingers for each roll, one on each side of each roll, and pivot them to the roll.

6 6, Fig. 1, are lugs on the sides of the rolls which the legs of the distending-fingers embrace and to which they are pivoted by thestationary pivots 7 7.

8, Fig. 1, is a spring attached to one end of the stationary pin 7 and having an end bent over to engage the arm 5 and normally throw the same outward-that is, away from the rolls, as shown in dotted lines in Fig. at.

9 9 arestationary cams located on the frame and adapted to throw the fingers .5 5 inward to the position shown in Figs. 2 and 3 and release the same at the proper times. As the rolls rotate from the position shown in Fig. 4 to that shown in Fig. 5 the air-suction will open the plies of the bag, as shown in Fig. 5, and the fingers then ride up on the projections 10 of cams 9 (see Fig. 5) and are thrown inward, where their turned-over ends will enter between the plies at each side of the bag and hold the same against the face of the rolls. As the rolls are further rotated the bag will be further distended until the parts reach the position shown in Figs. 1 and 3, when the bottom-forming end of the bag will have been distended into a substantially rectangular form, as shown.

- I prefer to use my machine as a head or attachment to the machine which forms the bellows-folded bag, as shown in Fig. 7; but I do not desire to be limited to this feature, and when I speak of a bag I do not mean that the bottom must necessarily have been already closed, although I preferably act upon a bag after the bottom has been pasted. In the present embodiment of my invention I rotate the rolls backward after they have reached the position shown in Fig. l and double'the bottom of the bag over upon itself, preferably as shown in Fig. 8, thus defining To assist in doubling over the bottom I have provided a device which in this embodiment consists of a reciprocating box 22, Fig. 2, carried on a transverse rod 21, attached to slides 19 19, having pins 20 standing on either side of the reciprocating levers 17. Cam 13, Fig. 1, is fixed to cam 14 and engages a roller- Stud 23 on lever-arm 16, fixed to the hollow shaft 15, which carries levers 17, engaging said pins 20. Spring 18, Fig. 3, throws arms 17 to the left in Fig. 1. As cam 13 starts to throw the rack and folder backward the rolls will be rotated backward and the bottom of the bag will be folded inward between the sides, as shown in dotted lines in Fig. 6, and

when the rolls and fingers reach the position shown in full lines in Fig. 6 the fingers will ride off from the cam-faces l0 and will be thrown outward by the springs 8, thus releasing the bag and allowing the same to be delivered by the rolls at the right-hand or rear side of the machine where it entered. The flat rear face of the folder 22 presses against the seam D of the bag, Figs; 3 and 7, and if the paste has not yet dried will tend to prevent the same being drawn apart. When the bag is delivered from the machine, it in this embodiment has the appearance shownin Fig. 8, the bottom being folded over upon itself. In this embodiment the bottom of the bag is not folded over upon the outside of the bag, but is doubled over upon itself.

I am aware that very many changes may be made in the constructions herein disclosed without departing from the spirit of my invention, and I therefore do not desire to be limited to the particular embodiments herein described and illustrated.

What I claim is- 1. In abag-machine in combination, a rotatable suction device adapted to contact with one side of a flattened bag, means to hold the opposite side of said bag and means to exhaust the air from said suction device and rotate the same whereby said bag is distended, and means to double the bottom thereof over upon itself.

2. In a bag-machine in combination, arotatable suction device adapted to contact with one side of a flattened bag, means to hold the opposite side of said bag, means to exhaust the air from said suction device and means to rotate the-same whereby the bottom of said bag is distended, and means adapted to contact with the bottom of said bag anddouble the said bottom over upon itself.

3. In abag-machinein combination, a rotatable suction device adapted to contact with a bag, means to exhaust the'air therefrom and rotate the same to distend the bag, means rotatable with said suction device and adapted to engage said bag to assist in distending the bottom of the same into a substantially rectangular form, and means to double the bottom thereof over upon itself.

4. In a bag-machine in combination, arotatable suction device adapted to contact with one side of a flattened bag, means to hold the opposite side of said bag, an exhausting device to exhaust air from said suction device and means to rotate the same whereby the bottom of said bag is distended, and means running transversely of said distended bottom and adapted to contact with substantially the center of said bottom and double the same over upon itself. I

5. In a bag-machine in combination, a plurality of suction devices adapted to contact with the opposite sides of a bag, means to exhaust the air therefrom and rotate the same to distend said bag, means movable toward the face of and rotatable with said suction devices and adapted to engage said bag and assisting in distending the bottom of the same into a substantially rectangular form and means to double the bottom thereof over upon itself.

6. In a bag-machine in combination, a set of rolls provided with suction devices and adapted to receive between them a bag and feed the same forward, means to exhaust the air from said suction devices and rotate the rolls whereby the bag-bottom is distended, a device to double the bottom thereof over upon itself, and means to move said device.

7. A set ofrotatable suction devices adapted to receive a bag between them, means to exhaust the air therefrom and means to rotate the same in opposite directions whereby the bottom of said bag is distended, and means to double the bottom thereof over upon itself.

8. In a bag-machine in combination, a set of rolls provided with suction devices which are adapted to receive between them a fiattened bag, means to exhaust the air therefrom and means to rotate said rolls in opposite directions, whereby the bottom of said bag is distended, and means adapted to contact with said bottom and double the distended bottom over upon itself.

9. In a bag-machine in combination, a roll, means to rotate the same in one direction to assist in carrying a bag forward, means to distend the bottom-forming end of the bag and double the bottom of the bag over upon itself, and means to rotate said roll backward to carry said folded bag backward to deliver the same.

10. In a bag-folding machine in combination, a roll, means to rotate the same in one direction to assist in carrying a bag forward, means rotatable with said roll to distend the bottom of the bag, a folding device to fold backward the central part of the distended bottom, means to rotate said roll backward to carry said folded bag backward to deliver the same.

11. In a bag-folding machine in combination, a roll, means to rotate the same in one direction to assist in carrying a bag forward,

means to distend the bag, a folder, and means to move said folder backward and double the bottom of the bag over upon itself.

12. In a bag-folding machine in combination, a plurality of rolls adapted to receive between them a bellows-folded bag, means to rotate the same forward to carry the bag forward, means including a suction device rotatable with each roll to distend the plies of the bag at each side, a folding device, meansto move the same backward to double the bottom of the bag over upon itself, and means to rotate said rolls backward to carry said folded bag backward to deliver the same.

13. In a bag-machine in combination, a plurality of rolls adapted to receive between them and feed forward a flattened bag, distendinglingers for each roll rotatable with the same and movable radially of said rolls and adapted to grasp opposite sides of the bag, stationary cams adapted to actuate said fingers and throw the same inward to engage said bag and distend the bottom thereof into a substantially rectangular form, and means to double the bottom thereof over upon itself.

14. In a bag machine in combination, means to carry forward a bag, a folding device to then double the bottom of the bag over upon itself, and means to then carry said bag backward to deliver the same.

15. In a bag-machine in combination, a pair of rolls adapted to receive between them and carry forward a flattened bag, means to distend the bottom of the bag, a folding device to then double the bottom of the bag over upon itself, and means to then rotate said rolls and carry said bag backward to deliver the same.

16. In a bagmachine in combination, means to distend the bottom-forming end of a bag, and rearwardly-moving means adapted to double said bottom over upon itself into two substantially rectangular portions.

Signed at New York, N. Y., this 5th day of December, 1900.

GEORGE R. WARD.

I/Vitnesses:

EMERSON R. NEWELL, JOSEPH E. DIAMOND. 

